$\left(3xy+2z^2\right)^3$
$sec2t=\frac{1}{\cos2t}$
$a^4-4a^2-16$
$\frac{d}{dx}\sqrt{6t}+\frac{\sqrt{7}}{t}$
$5x-2<7x+1$
$\frac{d}{dx}\sqrt{\frac{x-5}{x^6+2}}$
$\lim_{x\to\pi}\left(xtan\left(x\right)\right)$
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